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Title
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Tuning the turnover frequency and selectivity of photocatalytic CO₂ reduction to CO and methane using platinum and palladium nanoparticles on Ti-Beta zeolites
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Author
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Abstract
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| A Ti-Beta zeolite was used in gas phase photocatalytic CO2 reduction to reduce the charge recombination rate and increase the surface area compared to P25 as commercial benchmark, reaching 607 m2 g-1. By adding Pt nanoparticles, the selectivity can be tuned toward CO, reaching a value of 92% and a turnover frequency (TOF) of 96 µmol.gcat-1.h-1, nearly an order of magnitude higher in comparison with P25. By adding Pd nanoparticles the selectivity can be shifted from CO (70% for a bare Ti-Beta zeolite), toward CH4 as the prevalent species (60%). In this way, the selectivity toward CO or CH4 can be tuned by either using Pt or Pd. The TOF values obtained in this work outperform reported state-of-the-art values in similar research. The improved activity by adding the nanoparticles was attributed to an improved charge separation efficiency, together with a plasmonic contribution of the metal nanoparticles under the applied experimental conditions. |
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Language
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English
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Source (journal)
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Chemical engineering journal. - Lausanne, 1996, currens
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Publication
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Lausanne
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Elsevier Sequoia
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2021
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ISSN
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1385-8947
[print]
1873-3212
[online]
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DOI
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10.1016/J.CEJ.2020.128234
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Volume/pages
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410
(2021)
, 12 p.
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Article Reference
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128234
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ISI
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000623394200004
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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Full text (open access)
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Full text (publisher's version - intranet only)
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